<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <ul>
        <li v-for="(item,index) in list" :key="item.id">
          <span>{{item.content}}</span>
          <button @click="del(item.id)">删除</button>
        </li>
      </ul>
      <button @click="add()">生成</button>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: '#app',
        data: {
          list: [
            {
              id: 1,
              content: 3
            },
            {
              id: 2,
              content: 5
            }
          ]
        },
        methods: {
          del(id) {
            this.list = this.list.filter(item => item.id !== id)
          },
          add() {
            this.list.push({
              id: new Date(),
              content: parseInt(Math.random() * 20)
            })
          }
        }
      })
    </script>
  </body>
</html>
